Converters to provide light load output
AssigneeHewlett Packard Enterprise Development LP
InventorsMohamed Amin Bemat, Daniel Humphrey
Life of this patent
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Abstract
A power factor correcting (PFC) boost converter is to convert an input to an intermediate DC signal. A direct current (DC)-DC converter is to receive the intermediate DC signal and generate an output associated with an online condition. In response to a light-load indication, the PFC boost converter is to assume a disabled status to pass a rectified input to the DC-DC converter. The DC-DC converter is to convert the rectified input to generate the output associated with a light-load condition. The light-load condition output is provided at a voltage lower than the online condition output.
Claims18
An apparatus comprising:
- a power factor correcting (PFC) boost converter to convert an input to an intermediate direct current (DC) signal;
- and
- a DC-DC converter to receive the intermediate DC signal and generate an output associated with an online condition;
- wherein, in response to a light-load indication, the PFC boost converter is to assume a disabled status to pass a rectified input to the DC-DC converter, and the DC-DC converter is to convert the rectified input to generate an output associated with a light-load condition, wherein the output associated with the light-load condition has a voltage lower than the output associated with the online condition,
- wherein the DC-DC converter is to regulate the output associated with the light-load condition by varying a duty cycle in view of the rectified input and a minimum threshold voltage for operation of a downstream DC-DC converter that provides a regulated output voltage based on the output associated with the light-load condition from the DC-DC converter.
A system comprising:
- a power factor correcting (PFC) boost converter to convert an input to an intermediate direct current (DC) signal;
- a first DC-DC converter to receive the intermediate DC signal and generate an output associated with an online condition;
- a server to operate using the output associated with the online condition, and generate a light-load indication of a light-load condition at the server, the server comprising a second DC-DC converter;
- and
- a controller to receive the light-load indication and, in response to the light-load indication, cause the PFC boost converter to operate in a disabled status to generate a rectified input, and direct the first DC-DC converter to convert the rectified input to provide an output associated with the light-load condition, at a voltage lower than the output associated with the online condition,
- wherein the first DC-DC converter is to regulate the output associated with the light-load condition by varying a duty cycle in view of the rectified input and a minimum threshold voltage for operation of the second DC-DC converter that provides a regulated output voltage based on the output associated with the light-load condition from the first DC-DC converter;
- wherein the server is to operate in the light-load condition using the output associated with the light-load condition.
A method, comprising:
- disabling a power factor connecting (PFC) boost converter in response to a standby mode indication;
- providing, by the disabled PFC boost converter, a rectified input to a first DC-DC converter;
- downconverting, by the first DC-DC converter, the rectified input to a light-load output, at a voltage below an online output of the first DC-DC converter corresponding to an operation of the PFC boost converter in a non-disabled mode;
- and
- regulating, by a first DC-DC converter, the light-load output by varying a duty cycle in view of the rectified input and a minimum threshold voltage for operation of a second DC-DC converter, downstream of the first DC-DC converter, that provides a regulated output voltage based on the light-load output from the first DC-DC converter.
Dependencies are inferred from the claim text.